Monochromatic means that ?

• the light consist of two colors
• the light consist of only one color
• the light consist of three color
• only two light wavelengths are distinguished

Coherent means?

• The wavelength is on the same phase
• The wavelength is on different phase

Laser stands for ?

• light amplification by the stimulated emission of radiation.
• electromagnetic radiation to which the organs of sight react

which is an application of laser?

• medical application 
• Communication 
• cutting metals
• all of the above 

The picture indicates which property ? 

• Laser is Monochromatic 
• Laser is Coherent
• Laser is Directional 

One quantum of light energy is called a .........

What is the only type of EM waves the human eye can see?

• Radio waves

• Light waves

• Visible light

• Gamma ray waves

Light waves are ____________ waves.

• Transverse

• Compressional

• Longitudinal

• Electromagnetic

Tags

NGSS.HS-PS4-3

What is the weight of a 20kg box on the earth?

• 2 N

• 20 N

• 200 N

• 2000 N

THE ACCELERATION DUE TO GRAVITY DOES NOT DEPEND ON

• MASS OF THE OBJECT

• MASS OF EARTH

• RADIUS OF EARTH

• HEIGHT ABOVE EARTH SURFACE